Connecting

NATS clients have a range of options when establishing a connection to a NATS deployment. By default, all clients are configured to connect to the server on the loopback interface 127.0.0.1 and on port 4222.

$ nats-server
[93039] 2023/04/09 20:13:23.934070 [INF] Starting nats-server
[93039] 2023/04/09 20:13:23.934164 [INF]   Version:  2.9.15
[93039] 2023/04/09 20:13:23.934168 [INF]   Git:      [not set]
[93039] 2023/04/09 20:13:23.934172 [INF]   Name:     NBM2FFR6CT6DC6MHIYSORF56COBM4I7EEBTV4KAF2NGIJZGUIEP75BNF
[93039] 2023/04/09 20:13:23.934174 [INF]   ID:       NBM2FFR6CT6DC6MHIYSORF56COBM4I7EEBTV4KAF2NGIJZGUIEP75BNF
[93039] 2023/04/09 20:13:23.936995 [INF] Listening for client connections on 0.0.0.0:4222
[93039] 2023/04/09 20:13:23.937261 [INF] Server is ready

The default URL.

$ nats rtt
nats://127.0.0.1:4222:

   127.0.0.1: 110.558µs

*For the CLI, we are simply showing a round-trip time call from the client to the server.